Isn't that a performance concern though? Especially within the context of a react native implementation that environment is already going to push you way above

Isn't that a performance concern though? Especially within the context of a react native implementation that environment is already going to push you way above what is achievable with C++. If we're talking a 5% reduction in the net heap usage for a react native app at the cost of substantially more error prone code, is that really a win? Hell, make it 10%? These apps still readily fit in mobile hardware, and you wouldn't be using react native on a Pi or other more tightly resources embedded system.